The Atlantic has a first-person account of the Tiananmen Square uprising from a woman living in Beijing and teaching English. This is a truly amazing, gut-wrenching history of one US citizen's view of the events.
Reuters has a similar first-person account, with photographs.
One of the several photographers who were able to get a picture of Tank Man has released negatives from the uprising that were never published. It is a somber collection of primary sources that students could analyze in a discussion of the events in Beijing that spring.
The Washington Post outlines how the younger generation in China don't know what happened in 1989, nor the implications of the event.
The New York Times looks at how China is attempting to halt discussion of the anniversary - not easy with today's technology.
The Choices program from Brown University also has a lesson on Tank Man, released on the 20th anniversary of Tiananmen Square in 2009. This lesson focuses on censorship, media bias, and perspective.
On the 26th anniversary of Tiananmen Square, Business Insider posted an article with the story of how the Tank Man photographs were smuggled out of China, as well as the opportunity for close-up looks at the contact sheets (multiple photos, similar to negatives) from that day.